package net.lzzy.practices.web.course;

import net.lzzy.practices.constants.ApiConstants;
import net.lzzy.practices.constants.Messages;
import net.lzzy.practices.entities.Course;
import net.lzzy.practices.entities.User;
import net.lzzy.practices.services.CourseService;
import net.lzzy.practices.services.UserService;
import net.lzzy.practices.utils.StringUtils;
import net.lzzy.practices.web.models.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import java.util.ArrayList;
import java.util.List;
import java.util.UUID;

/**
 * @author Jaymo 2022/5/20
 * Description:
 */

@CrossOrigin
@RestController
@RequestMapping(ApiConstants.ROUTE_COURSE_ROOT)
public class CourseApiController {
    private final CourseService service;
    private final UserService uService;

    @Autowired
    public CourseApiController(CourseService service, UserService uService) {
        this.service = service;
        this.uService = uService;
    }

    @GetMapping(ApiConstants.ROUTE_COURSE_ALL)
    public ApiResult getCourses(@RequestParam String token) {
        List<VmCourse> courses = new ArrayList<>();
        service.get().forEach(course -> courses.add(VmCourse.create(course, false)));
        return new ApiResult(true, courses.size() + "", courses);
    }

    @GetMapping(ApiConstants.ROUTE_COURSE_OPEN)
    public ApiResult getOpenCourses(@RequestParam String token) {
        List<VmCourse> courses = new ArrayList<>();
        service.get(true).forEach(course -> courses.add(VmCourse.create(course, false)));
        return new ApiResult(true, courses.size() + "", courses);
    }

    @GetMapping(ApiConstants.ROUTE_COURSE_PAGE)
    public ApiResult getPagedCourses(@RequestParam String token, @RequestParam int page, @RequestParam int size) {
        List<VmCourse> courses = new ArrayList<>();
        service.get(page, size).forEach(course -> courses.add(VmCourse.create(course, false)));
        return new ApiResult(true, service.count() + "", courses);
    }

    @GetMapping(ApiConstants.ROUTE_COURSE_OPEN_PAGE)
    public ApiResult getPagedOpenCourses(@RequestParam String token, @RequestParam int page, @RequestParam int size) {
        List<VmCourse> courses = new ArrayList<>();
        service.get(true, page, size).forEach(course -> courses.add(VmCourse.create(course, false)));
        return new ApiResult(true, service.count() + "", courses);
    }

    @GetMapping(ApiConstants.ROUTE_COURSE_TEACHER)
    public ApiResult getTeachersCourses(@RequestParam String token, @RequestParam(name = "id") UUID teacherId) {
        List<VmCourse> courses = new ArrayList<>();
        service.getTeachersCourses(teacherId).forEach(course -> courses.add(VmCourse.create(course, true)));
        return new ApiResult(true, courses.size() + "", courses);
    }

    @GetMapping(ApiConstants.ROUTE_COURSE_STUDENT)
    public ApiResult getStudentsCourses(@RequestParam String token, @RequestParam(name = "id") UUID studentId) {
        List<VmCourse> courses = new ArrayList<>();
        service.getStudentsCourses(studentId).forEach(course -> courses.add(VmCourse.create(course, false)));
        return new ApiResult(true, courses.size() + "", courses);
    }

    @PostMapping(value = ApiConstants.ROUTE_COURSE_ADD, produces = "application/json", consumes = "application/json")
    public ApiResult add(@RequestBody CourseInfo info) {
        return addOrUpdate(null, info);
    }


    private ApiResult addOrUpdate(UUID id, CourseInfo info) {
        String token = info.getToken();
        String name = info.getName();
        String desc = info.getDesc();
        String cover = info.getCover();
        String teacherId = info.getTid();
        boolean open = info.isOpen();
        if (StringUtils.isEmpty(name) ||
                StringUtils.isEmpty(token) ||
                StringUtils.isEmpty(desc) ||
                StringUtils.isEmpty(cover) ||
                StringUtils.isEmpty(teacherId)) {
            return new ApiResult(false, Messages.INCOMPLETE_INFO.toString(), null);
        }
        User teacher = uService.getById(UUID.fromString(teacherId));
        if (teacher == null) {
            return new ApiResult(false, Messages.WRING_ID.toString(), null);
        }
        Course course;
        boolean create = id == null;
        if (create) {
            course = new Course();
            course.setTeacher(teacher);
        } else {
            course = service.getById(id);
            if (course == null) {
                return new ApiResult(false, Messages.WRING_ID.toString(), null);
            }
        }
        course.setOpen(open);
        course.setCover(cover);
        course.setName(name);
        course.setDescription(desc);
        if (create) {
            return new ApiResult(true, "添加成功", VmCourse.create(service.add(course), true));
        } else {
            Course updated = service.update(course, token);
            if (updated == null) {
                return new ApiResult(false, Messages.No_PERMISSION.toString(), null);
            }
            return new ApiResult(true, "更新成功", VmCourse.create(updated, true));
        }
    }

    @PostMapping(ApiConstants.ROUTE_COURSE_UPDATE)
    public ApiResult update(@PathVariable UUID id, @RequestBody CourseInfo info) {
        return addOrUpdate(id, info);
    }


    @PostMapping(ApiConstants.ROUTE_COURSE_OPEN_CLOSE)
    public ApiResult openCloseCourse(@RequestBody CourseOpenInfo info){
        String strCourseId = info.getCourseId();
        String token = info.getToken();
        boolean open = info.isOpen();
        if (StringUtils.isEmpty(strCourseId) || StringUtils.isEmpty(token)){
            return  new ApiResult(false,Messages.INCOMPLETE_INFO.toString(), null);
        }
        Course course =  service.openCloseCourse(UUID.fromString(strCourseId), open,token);
        if (course == null){
            return  new ApiResult(false,Messages.WRING_ID.toString(), null);
        }
        return  new ApiResult(true,Messages.SUCCESS.toString(), VmCourse.create(course,true));
    }

    @DeleteMapping(ApiConstants.ROUTE_COURSE_REMOVE)
    public  ApiResult delete(@RequestBody CourseKeyInfo info){
        String strCourseId = info.getCourseId();
        String token = info.getToken();
        if (StringUtils.isEmpty(strCourseId)  || StringUtils.isEmpty(token)){
            return  new ApiResult(false, Messages.INCOMPLETE_INFO.toString(), null);
        }
        Messages msg = service.remove(UUID.fromString(strCourseId), token);
        return  new ApiResult(msg == Messages.SUCCESS, msg.toString(), null);
    }
}